Winding staircase.



No. 705,794. T Patehtad July 29-," I902. I

H. SNIDEB.

WINDING STAIBCASE.

(Application flXed. NOV. 25 1901.) (No Model.) 2 Sheets-@heet 1.

WITNESSES: INVENTOR:

362% T BY .96 v

ATTORNEY.

' THE NORRIS PETERS c0, mom-urns" \usnmmon. o. c.

' No. 705,794., Patented July 29, I902. H. SNIDER.

WINDING STAIREASE.

(Application filled Now-25,1901.)

(no Modal.)

-' 2 Shan -Sheet 2.

I i ii a; a Q1 Q2 W1TNESSES: INVENTOR.

AYTTORNEK UNITED STATES? PATENT. OFFICE.

HARRISON SNIDEB, on INDIANAPOLIS, INDIANA.

wmeme s T AlRCASE.

SPECIFICATION fort-1a,; fat of Letters Patent No. 705,794, dated. July 29, 1902.

Application filed November 2d, 1901. erial No. 83,558. (No model.)

To all whom, it may concern.-

Beit known that I, HARRISON SNIDER, a citi zen of the United'States, residing atIndian apolis, in the county of Marion and State of Indiana, have invented new and useful Improvements in Winding Staircases, of which the following is a specification i Y The invention relates to the class of staircases that are designed to be erected on limited floor areas; and it has particular reference to the means whereby the inner or narrower ends of the steps of circular staircases are supported, the object being to eliminate the objectionable center post or column, which is obstructive when itis desired to carry such articles on the stairs as may have too much bulk to enter the passage-way usually pro- Vided between the center post and the outer wall at which the broader ends of the steps may be supported.

Another object is to provide cheap, durable, and fireproof stringer boards or their equivalents for supporting the steps, whether the staircase be winding or straight. I

These and other apparent objects are ac complished by the construction illustratedin the accompanying drawings, forming part of this specification, to which reference may be had, and in which similar reference characters designate corresponding parts in the several figures thereof.

Referring to the drawings, Figure 1 represents a fragmentary top plan of winding-stair stringer-boards (the term being employed as though they were composed of wood) constructed of sections of iron pipe and pipeflttings, the dotted lines indicating the plans of the treads; Fig. 2, a fragmentary perspective view of the stairs having the sectional stringer-boards; Fig. 3, a fragmentary perspective view as seen when looking toward the front of the lower step in Fig. 2, as from the line X X in.the direction indicated by the arrows, the positions of the riser-boards and treads being indicated only by dotted lines; Fig. at, afragmentary perspective view similar to Fig. 2, but including agreater portion of the stairs; Fig. 5, a fragmentary horizontal sectional view, and Fig. 6 a fragmentary rear elevation, showing the clips for securing the riser-boards to the pipe sections comprised in the stringer-boards; Fig. 7, a top view of a circular staircase constructed in accord with my invention and showing the open central support for the steps; Fig. 8, a vertical trans verse sectional view showing the winding stairs in a circular shaft or well; Fig, 9, a fragmentary detail view of a metallic stringerboard and integral balusters and rail before having. beenbent to shape, and Fig. 10 a frag mentary sectional View taken on a line Y Y in Fig. 9.

In Figs. 7, 8, 9, and 10 the stringer-boards are represented as being composed of rolled metal plates bent to therequired forms.

In practically carrying out my invention I may employ either the pipe sectional form or the 'metal plate form of stringer-boards, the

main object of the invention being attained .by bending the inner stringer substantially as thoughit were wound around a cylinder as a vine winds around a pole and the cylinder then withdrawn, so that the immediate pm-t that supports any given step does not than that of a center-post were one employed inconstruction, and therefore with the same diameter. of well the narrower and useless ends of the steps are shortened, leaving as 'much of the wider portions as can be used practically.

When employing the pipe sections and fittings in construction, flanges a are set upon the floor, and short upright sections of pipe A A A A are screwed into the flanges, forminglegs to support the stringers Upon the upper ends of said short sections are screwed pipe-Ts B B B B On theinncr stringer, however, instead of the T B? andsection A with its flange, I may use an L D, connected by a horizontalpipe-section G to the T B. The Ts B and B have their side openings opposing each other, and a horizontal pipesection 0' connects these Ts. An upright pipe-section E somewhat longer than the section A is screwed into the L. D (or into a T,

it used) and an L D is attached to its upper end and to it is attached a short horizontal section 0, to which is connected an L D to which is attached an upright section E, this.

having a T B connected to its upper end, to which is attached a horizontal section 0, the same having an L D connected to it, and so on, another T, B", being employed where it may be desired in similar positions as the Us D are used, the latter being sometimes dispensed with on the inner stringer if it is desired to have balusters close together, the balusters E being erected upon the Ts, as B B B similar Ts being substituted for the Us D when it is desired to have a baluster at each step. The outer stringer is similarly formed of the upright sections A A the sections 0, arranged horizontally, the Ts B B B B B B the Us D the upright sections E, and a suitable number of posts A. The balusters E have oblique-angled flanges b se-- cured to their upper ends, to which the rails d are secured. Riser-boards e are secured to the sections E by means of clamps g, and treads f are suitably secured either to the horizontal sections 0 O or to the connecting pipe-fittings.

It will be understood that variations may be made from the particular arrangement of parts shown in the drawings.

When employing the plate form of stringerboards F F, they are preferably composed of short sections first rolled to the proper twisted form and then spliced together, in some cases the plates being built up of two or more thicknesses or laminated. Cleats i are employed upon which to rest the treads of the stairs. When balnsters G are desired, they are preferably formed integrally, as is also the rail H, finishing-pieces I and J being employed to cover and ornament the iron plates.

In Figs. 7 and 8, Kindicates the lower step, K the upper step,andftheintermediate steps, h being the inclosing wall of the stairway, and it will be seen that if a person ascend the steps he may carry an article reaching nearly from side to side of the wall across the stringer F.

Many modifications may be obviously suggested in the details of construction Within the scope of my invention, which, as will be seen, refers more particularly to the central or inner support for the steps, which is substantially a twining column having an open or hollow axis.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is-

1. A staircase including stringers comprising socket base-flanges, sections of piping vertical upon the flanges, Ls upon the sections of piping, sections of piping attached horizontally to the Ls, Ls attached to the horizontal sections of piping, and sections of piping extending vertically from the Ls and attached thereto, the horizontal sections of piping being supported by the Ls, and the Us supported by the vertical sections of piping, substantially as set forth.

2. Astaircase including stringers comprising socket base-flanges, sections of piping vertical upon the flanges, Ts upon the sections of piping, sections of piping having obliqueangled flanges and vertical upon the Ts, sections of piping attached horizontally to the Ts, Ls attached to the horizontal sections of piping, sections of piping extending vertically from the Us and attached thereto, the horizontal sections of piping being supported by the Us and the Ts, and the Us supported by the vertical sections of piping,and handrails attached to the oblique-angled flanges, substantially as set forth.

3. A staircase comprising base-Ilanges,vertical pipe-sections attached to the flanges, Ts attached to the vertical pipe-sections, pipe balusters attached to the Ts, a hand-rail mounted upon the pipe balusters, horizontal pipe-sections attached to and supported by the Ts, Ls attached to and supported by the horizontal pipe-sections,vertical pipe-sections attached to and supported by the Ls, and tread members supported upon the horizontal pipe-sections,substantially as set forth.

4. A staircase comprising vertical pipe-sections, Us, and horizontal pipe-sections, alternately, connected together, the vertical sections forming the risers and the horizontal sections forming the treads of the stringers,riserboards attached to the vertical pipe-sections, and tread-boards mounted upon the horizontal pipe=sections, substantially as set forth.

5. A staircase comprising stringers composed of vertical pipe-sections, Ts, Ls,horizontal pipe sections in pairs of unequal lengths,andbase-flanges,the vertical sections being supported by the base-flanges and the Us and the Ts, and the horizontal sections by the Ts and the Us; riser-boards attached to the vertical pipe-sections, and tread-boards mounted on the horizontal sections, each tread-board on a long and a short section, substantially as set forth.

In testimony whereof I affix my signature in presence of two witnesses. I

HARRISON SNIDER.

Witnesses:

WM. H. PAYNE, E. T. SILVIUs. 

